/*
 * Copyright (c) 2007, Swedish Institute of Computer Science.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the Institute nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * This file is part of the Contiki operating system.
 *
 * $Id: example-mesh.c,v 1.7 2010/01/15 10:24:35 nifi Exp $
 */

/**
 * \file
 *         A brief description of what this file is.
 * \author
 *         Adam Dunkels <adam@sics.se>
 */

#include "contiki.h"
#include "net/rime.h"
#include "net/rime/mesh.h"

#include "dev/button-sensor.h"

#include "dev/leds.h"

#include <stdio.h>

static struct mesh_conn mesh;
static int counter;
/*---------------------------------------------------------------------------*/
PROCESS(example_mesh_process, "Mesh example");
AUTOSTART_PROCESSES(&example_mesh_process);
/*---------------------------------------------------------------------------*/
static void
sent(struct mesh_conn *c)
{
  printf("packet sent\n");
}
static void
timedout(struct mesh_conn *c)
{
  printf("packet timedout\n");
}
static void
recv(struct mesh_conn *c, const rimeaddr_t *from, uint8_t hops)
{
  printf("counter: %d\n", ++counter);
  printf("Data received from %d.%d: %.*s (%d)\n",
	 from->u8[0], from->u8[1],
	 packetbuf_datalen(), (char *)packetbuf_dataptr(), packetbuf_datalen());

  packetbuf_copyfrom("Hopp", 4);
  mesh_send(&mesh, from);
}

#define f 1000//frequency Hz
#define points (570000/f)//points to output in 570000 microseconds
#define PI 3.141592653589793238
#define ALMOSTZERO 0.00000005

static float sinf(float angle_d) // this is my sine function
{
    float angle_r;
    angle_r = angle_d * (PI/180);
    float sum, term;
    int n;
    sum = angle_r;
    term = 1;
    n = 1;
    while (term>ALMOSTZERO)
    {
        term = term * ((angle_r*angle_r*angle_r)/((3*n)*(3*n-1)*(3*n-2)));
        sum = sum - term;
        n++;
        term = term * ((angle_r*angle_r*angle_r)/((3*n)*(3*n-1)*(3*n-2)));
        sum = sum + term;
        n++;
    }
    return sum;
}

static void Clock_Initialization()
{
  //BCSCTL1 = CALBC1_8MHZ;                    // Set DCO
  //DCOCTL = CALDCO_8MHZ; 
  //BCSCTL2=0x00;   // divider=4 for  MCLK,1 for SMCLK
}

void DAC0_Initial()
{
ADC12CTL0 = REF2_5V + REFON;              // Internal 2.5V ref on
  TACCR0 = 0;//13600;                           // Delay to allow Ref to settle
  TACCTL0 |= CCIE;                          // Compare-mode interrupt.
  TACTL = TACLR + MC_1 + TASSEL_2;          // up mode, SMCLK

  DAC12_0CTL = DAC12SREF_0+DAC12IR + DAC12AMP_5 + DAC12ENC; // VREF+--2.5V
  DAC12_0DAT=0x7ff;   // initial value is zero
}

const static struct mesh_callbacks callbacks = {recv, sent, timedout};
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(example_mesh_process, ev, data)
{
  PROCESS_EXITHANDLER(mesh_close(&mesh);)
  PROCESS_BEGIN();

unsigned int sine_value[points];
unsigned int i;
Clock_Initialization();
DAC0_Initial();
TAR=0;

for (i=0;i<points;i++) {
  sine_value[i]=2048*sinf(6.28*f*i/570000)+2048;
}

i=0;

while(1)
{
  DAC12_0DAT=sine_value[i++ ];
  if (i>=points)
  i=0;
}

  mesh_open(&mesh, 132, &callbacks);

  SENSORS_ACTIVATE(button_sensor);

  unsigned int Counter = 0;
  while(++Counter<10000) {
	  
  leds_on(LEDS_BLUE);
  leds_off(LEDS_BLUE);
    //rimeaddr_t addr;
    //static struct etimer et;

    /*    etimer_set(&et, CLOCK_SECOND * 4);*/
    /*PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&et) ||
			     (ev == sensors_event && data == &button_sensor));*/
    
    //printf("Clock: %d\n", clock_time());
    
    /*packetbuf_copyfrom("Hej", 3);
    addr.u8[0] = 0;
    addr.u8[1] = 1;
    mesh_send(&mesh, &addr);*/
  }
  printf("Clock: %d\n", clock_time());
  PROCESS_END();
}
/*---------------------------------------------------------------------------*/
